Alera Elusion II Series Mesh Mid-Back Swivel/Tilt Chair, Adjustable Arms, Supports 275lb, 17.51" to 21.06" Seat Height, BlackGo beyond the basics with this mid back office chair. Its arms are height and width adjustable, as well as giving you the option to pivot them in or out, enabling your arms to rest in a comfortable position. Breathable mesh back helps you stay cool, even if your office isn't. Contoured molded foam fabric seat provides resiliency and comfort during the longest work days. Ergonomically designed chair frame encourages proper posture. Height adjustable